<template>
	<view>
		<view class="search-box">
		  <!-- 使用 uni-ui 提供的搜索组件 -->
		  <uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
		</view>
		
		<!-- 搜索建议列表 -->
	<view class="sugg-list" v-if="searchResults.length!==0">
	  <view class="sugg-item" v-for="(item, index) in searchResults" :key="index" @click="gotoDetail(item)">
		<view class="goods-name">{{item.goods_name}}</view>
		<uni-icons type="arrowright" size="16"></uni-icons>
	  </view>
	</view>
	
	<!-- 搜索历史 -->
	<view class="histroy-box" v-else>
		<view class="histroy-title">
			<text>搜索历史</text>
			<uni-icons type="trash" size="17" @click="clean"></uni-icons>
		</view>
		<view class="histroy-list">
			<uni-tag :text="item" v-for="(item,index) in historys" :key="index" @click="gotoGoodsList(item)"></uni-tag>
		</view>
	</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer:null,
				kw:'',
				searchResults:[],
				historyList:[]
			};
		},
		onLoad(){
			this.historyList = JSON.parse(uni.getStorageSync('kw'||'[]'))
		},
		methods:{
			// input输入事件处理函数
			input(e){
				clearTimeout(this.timer)
				this.timer = setTimeout(()=>{	
					this.kw = e
					this.getSearchList()
				},500)
			},
			async getSearchList(){
				// 是否为空
				if(this.kw.length === 0){
					this.searchResults=[]
					return 
				}
				const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
				if(res.meta.status !== 200) return uni.$showMsg()
				this.searchResults = res.message
				this.saveSearchHistory()
			},
			gotoDetail(item){
				console.log(item.goods_id);
				uni.navigateTo({
					url:'/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
				})
			},
			saveSearchHistory(){
				// this.historyList.push(this.kw)
				const set = new Set(this.historyList)
				set.delete(this.kw)
				set.add(this.kw)
				this.historyList = Array.from(set)
				
				// 持久化存储
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			clean(){
				this.historyList= []
				uni.setStorageSync('kw','[]')
			},
			gotoGoodsList(kw){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?query='+ kw
				})
			}
		},
		computed:{
			historys(){
				return [...this.historyList].reverse()
			}
		}
	}
</script>

<style lang="scss">
.search-box{
	position: sticky;
	top: 0;
	z-index: 999;
}
.sugg-list {
  padding: 0 5px;

  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    align-items: center;
    justify-content: space-between;
	
    .goods-name {
      // 文字不允许换行（单行文本）
      white-space: nowrap;
      // 溢出部分隐藏
      overflow: hidden;
      // 文本溢出后，使用 ... 代替
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.histroy-box{
	padding: 0 5px;
	.histroy-title{
		display: flex;
		justify-content: space-between;
		height: 40px;
		align-items: center;
		font-size: 13px;
		border-bottom: 1px solid #efefef;
	}
	.histroy-list{
		display: flex;
		flex-wrap: wrap;
		.uni-tag{
			margin-top: 5px;
			margin-right: 5px;
		}
	}
}
</style>
